stat_wl_strip {ggspectra} | R Documentation |
Calculate colours from wavelength.
Description
stat_wl_strip
computes color definitions according to human vision.
Usage
stat_wl_strip(
mapping = NULL,
data = NULL,
geom = "rect",
w.band = NULL,
length.out = 150,
chroma.type = "CMF",
position = "identity",
na.rm = TRUE,
show.legend = FALSE,
inherit.aes = TRUE,
...
)
wl_guide(
mapping = NULL,
data = NULL,
chroma.type = "CMF",
w.band = NULL,
length.out = 150,
ymin = -Inf,
ymax = Inf,
position = "identity",
na.rm = FALSE,
show.legend = FALSE,
inherit.aes = TRUE,
...
)
Arguments
mapping |
The aesthetic mapping, usually constructed with
|
data |
A layer specific dataset - only needed if you want to override the plot defaults. |
geom |
The geometric object to use display the data |
w.band |
waveband object or a list of such objects or NULL. |
length.out |
The number of steps to use to simulate a continuous range of colours when w.band == NULL. |
chroma.type |
character one of "CMF" (color matching function) or "CC"
(color coordinates) or a |
position |
The position adjustment to use for overlapping points on this layer |
na.rm |
a logical value indicating whether NA values should be stripped before the computation proceeds. |
show.legend |
logical. Should this layer be included in the legends?
|
inherit.aes |
If |
... |
other arguments passed on to |
ymin , ymax |
numeric used as aesthetics for plotting the guide. |
Value
generic_spect object with new x
values plus other computed
variables described below.
Computed variables
- x
(w.low + wl.high) / 2
- wl.low
boundary of waveband
- wl.high
boundary of waveband
- wl.color
color corresponding to wavelength
- wb.color
color corresponding to waveband
- wb.name
label of w.band
Default aesthetics
Set by the statistic and available to geoms.
- x
..x..
- label
as.character(..wb.f..)
- xmin
..wl.low..
- xmax
..wl.high..
- fill
..wb.color..
Required aesthetics
Required by the statistic and need to be set with aes()
.
- x
numeric, wavelength in nanometres
Note
This stat uses a panel function and ignores grouping as it is meant to be used for annotations.
See Also
color_of
, which is used internally.
Other stats functions:
stat_color()
,
stat_find_qtys()
,
stat_find_wls()
,
stat_label_peaks()
,
stat_peaks()
,
stat_spikes()
,
stat_wb_box()
,
stat_wb_column()
,
stat_wb_contribution()
,
stat_wb_hbar()
,
stat_wb_irrad()
,
stat_wb_label()
,
stat_wb_mean()
,
stat_wb_relative()
,
stat_wb_sirrad()
,
stat_wb_total()
,
stat_wl_summary()
Examples
# ggplot() methods for spectral objects set a default mapping for x and y.
ggplot(sun.spct) + geom_line() +
stat_wl_strip(ymax = -0.02, ymin = -0.04) +
scale_fill_identity()
# on some graphic devices the output may show spurious vertical lines
ggplot(sun.spct) + wl_guide(alpha = 0.33, color = NA) + geom_line()